The problem
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how do i solve for a specific variable in a problem?
Answer provided by our tutors
If you want to solve and equation for a variable, you need to type in the equation first.
In your case you have type in an expression '2x^2+bx-9' so that is why there is no solution.
Type in an equation like for ex. '2x^2+bx-9 = 0', select solve for 'x' and you will get the following solution:
